Drawings of Stylotheristus flagellicaudatus sp. nov. A lateral view of pharyngeal region of holotype B lateral view of posterior portion, showing long conico-cylindrical tail C lateral view of anterior portion of holotype, showing the two circles of anterior setaes and oval amphideal fovea D entire view of male E cloacal region of holotype, showing spicule and gubernaculum. Scale bars: 20 µm (A–C, E), 30 µm (D).